Teaching balancing equations to high school students is
difficult, because often some of the students are still at Piagetís concrete
rather than abstract reasoning stage.†
That is, they canít just see the molecules in their head and/or draw
them correctly.† This lesson plan makes
use of an online app (http://funbasedlearning.com/chemistry/default.htm)
which makes that abstraction concrete Ė all of my grade 9 class mastered
balancing equations in an hour (including the remedial students) using an early
prototype of this app.